diff --git a/xml/System/Span`1+Enumerator.xml b/xml/System/Span`1+Enumerator.xml
index 84404280450..ba90a4468c1 100644
--- a/xml/System/Span`1+Enumerator.xml
+++ b/xml/System/Span`1+Enumerator.xml
@@ -21,8 +21,30 @@
     </Attribute>
   </Attributes>
   <Docs>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
+    <summary>Provides an enumerator for the elements of a <see cref="T:System.Span`1" />.</summary>
+    <remarks>
+      <format type="text/markdown"><![CDATA[  
+
+The C# [foreach](~/docs/csharp/language-reference/keywords/foreach-in.md) of the C# language and the [For Each...Next](~/docs/visual-basic/language-reference/statements/for-each-next-statement.md) construct in Visual Basic hides the complexity of enumerators. Instead of directly manipulating the enumerator, using `foreach` or `For Each...Next` is recommended. 
+
+Enumerators can be used to read the data in the <xref:System.Span%601>, but they cannot be used to modify it. 
+
+Initially, the enumerator is positioned before the first element in the <xref:System.Span%601>. At this position, <xref:System.Span%601.Enumerator.Current> is undefined, so you must call <xref:System.Span%601.Enumerator.MoveNext%2A> to advance the enumerator to the first item in the <xref:System.Span%601> before reading the value of <xref:System.Span%601.Enumerator.Current>.
+
+<xref:System.Span%601.Enumerator.Current> returns the same object until <xref:System.Span%601.Enumerator.MoveNext%2A> is called. <xref:System.Span%601.Enumerator.MoveNext%2A> sets  <xref:System.Span%601.Enumerator.Current> to the next item in the <xref:System.Span%601>.
+
+If <xref:System.Span%601.Enumerator.MoveNext%2A> passes the end of the <xref:System.Span%601>, the enumerator is positioned after the last item in the <xref:System.Span%601>, and <xref:System.Span%601.Enumerator.MoveNext%2A> returns `false`. When the enumerator is at this position, subsequent calls to <xref:System.Span%601.Enumerator.MoveNext%2A> also return `false`. If the call to <xref:System.Span%601.Enumerator.MoveNext%2A> returns `false`, <xref:System.Span%601.Enumerator.Current> is undefined. You cannot set <xref:System.Span%601.Enumerator.Current> to the first item in the <xref:System.Span%601> again; you must create a new enumerator instance instead. 
+
+The enumerator does not have exclusive access to the <xref:System.Span%601>; therefore, enumerating through a span is intrinsically not a thread-safe procedure. To guarantee thread safety during enumeration, you can lock the span during the entire enumeration. To allow the span to be accessed by multiple threads for reading and writing, you must implement your own synchronization. 
+
+Unlike some other enumerator structures in .NET, <xref:System.Span%601.Enumerator>:
+
+- Does not implement the <xref:System.Collections.IEnumerator> or <xref:System.Collections.Generic.IEnumerator%601> interface.
+
+- Does not include a `Reset` method, which sets the enumerator to its initial position before the first element in the span.
+ 
+      ]]></format>
+    </remarks>
   </Docs>
   <Members>
     <Member MemberName="Current">
@@ -40,9 +62,23 @@
         <ReturnType>T@</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
-        <remarks>To be added.</remarks>
+        <summary>Gets the item at the current position of the enumerator.</summary>
+        <value>The element in the <see cref="T:System.Span`1" /> at the current position of the enumerator.</value>
+        <remarks>
+      <format type="text/markdown"><![CDATA[  
+
+`Current` throws an <xref:System.IndexOutOfRangeException> under either of the following conditions: 
+
+- Immediately after the enumertor is created, the enumerator is positioned before the first element in the span. <xref:System.Span%601.Enumerator.MoveNext%2A> must be called to advance the enumerator to the first element of the span before reading the value of `Current`.
+
+- The last call to <xref:System.Span%601.Enumerator.MoveNext%2A> returned `false`, which indicates the end of the span. 
+
+`Current` returns the same object until <xref:System.Span%601.Enumerator.MoveNext%2A> is called. <xref:System.Span%601.Enumerator.MoveNext%2A> sets `Current` to the next item in the span. 
+
+      ]]></format>
+        </remarks>
+        <exception cref="T:System.IndexOutOfRangeException">
+          The enumerator is positioned either before the first item or after the last item in the <see cref="System.Span`1" />.</exception> 
       </Docs>
     </Member>
     <Member MemberName="MoveNext">
@@ -61,9 +97,17 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Advances the enumerator to the next item of the <see cref="System.Span`1" />.</summary>
+        <returns>`true` if the enumerator successfully advanced to the next item; `false` if the enumerator has passed the end of the span.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+
+After an enumerator is created,it is positioned before the first element in the span, and the first call to `MoveNext` advances the enumerator to the first item in the span. 
+
+If `MoveNext` passes the end of the span, the enumerator is positioned after the last item in the span, and `MoveNext` returns `false`. When the enumerator is at this position, subsequent calls to `MoveNext` also return `false`.
+
+         ]]></format>
+        </remarks>
       </Docs>
     </Member>
   </Members>
diff --git a/xml/System/Span`1.xml b/xml/System/Span`1.xml
index a3c0bb4d691..2a290792f56 100644
--- a/xml/System/Span`1.xml
+++ b/xml/System/Span`1.xml
@@ -28,9 +28,14 @@
     </Attribute>
   </Attributes>
   <Docs>
-    <typeparam name="T">To be added.</typeparam>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
+    <typeparam name="T">The type of items in the <see cref="System.Span`1" />.</typeparam>
+    <summary>Represents a contiguous region of arbitrary memory that is type- and memory-safe.</summary>
+    <remarks>
+      <format type="text/markdown"><![CDATA[  
+A `Span<T>` instance is often used to hold the elements of an array or a portion of an array. Unlike an array, however, a `Span<T>` instance can point to managed memory, native memory, or memory managed on the stack.
+
+      ]]></format>
+    </remarks>
   </Docs>
   <Members>
     <Member MemberName=".ctor">
@@ -52,9 +57,17 @@
         <Parameter Name="array" Type="T[]" />
       </Parameters>
       <Docs>
-        <param name="array">To be added.</param>
-        <summary>To be added.</summary>
-        <remarks>To be added.</remarks>
+        <param name="array">The array from which to create the <see cref="T:System.Span`1" /> object. </param>
+        <summary>Creates a new <see cref="T:System.Span`1" /> object over the entirety of a specified array.</summary>
+        <remarks>
+      <format type="text/markdown"><![CDATA[  
+
+If `array` is `null`, this constructor returns a `null` `Span<T>`.
+
+      ]]></format>
+        </remarks>
+        <exception cref="T:System.TypeMismatchException">
+          <paramref name="T" /> is a reference type, and <paramref name="array" /> is not an array of type <paramref name="T" />.</exception> 
       </Docs>
     </Member>
     <Member MemberName=".ctor">
@@ -81,10 +94,20 @@
         <Parameter Name="length" Type="System.Int32" />
       </Parameters>
       <Docs>
-        <param name="pointer">To be added.</param>
-        <param name="length">To be added.</param>
-        <summary>To be added.</summary>
-        <remarks>To be added.</remarks>
+        <param name="pointer">A pointer to the starting address of a specified number of bytes in memory.</param>
+        <param name="length">The number of bytes to be included in the <see cref="T:System.Span~1" />.</param>
+        <summary>Creates a new <see cref="T:System.Span`1" /> object  from a specified number of bytes starting at a specified memory address.</summary>
+        <remarks>
+      <format type="text/markdown"><![CDATA[  
+
+        This constructor should be used with care, since it creates arbitrarily typed `T`s from a `void*`-typed block of memory, and `length` is not checked. However, if the constructor succeeds in creating a new <xref:System.Span%601> object, all subsequent uses are correct.        
+
+      ]]></format>
+        </remarks>
+        <exception cref="T:System.ArgumentException">
+          <paramref name="T" /> is a reference type or contains pointers and therefore cannot be stored in unmanaged memory.</exception> 
+        <exception cref="T:System.ArgumentOutOfRangeException">
+          <paramref name="length" /> is negative.</exception> 
       </Docs>
     </Member>
     <Member MemberName=".ctor">
@@ -103,9 +126,9 @@
         <Parameter Name="start" Type="System.Int32" />
       </Parameters>
       <Docs>
-        <param name="array">To be added.</param>
-        <param name="start">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="array">The source array.</param>
+        <param name="start">The index of the first element in the array to include in the <see cref="T:System.Span`1" /> object.</param>
+        <summary>Creates a new <see cref="T:System.Span`1" /> object from a specified array starting at a specifed index position and continuing to the end of the array.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -130,11 +153,20 @@
         <Parameter Name="length" Type="System.Int32" />
       </Parameters>
       <Docs>
-        <param name="array">To be added.</param>
-        <param name="start">To be added.</param>
-        <param name="length">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="array">The source array.</param>
+        <param name="start">The index of the first element to include in the new <see cref="T:System.Span~1" />.</param>
+        <param name="length">The number of elements to include in the new <see cref="T:System.Span~1" />. </param>
+        <summary>Creates a new <see cref="T:System.Span`1" /> object that includes a specified number of elements of an array starting at a specified index.</summary>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentOutOfRangeException">
+          <paramref name="array" /> is <see langword="null" />, but <paramref name="start" /> or <paramref name="length" /> is non-zero.<p />
+          --or--<p />
+          <paramref name="start" /> is outside the bounds of the array. <p />
+          --or--<p />
+          <paramref name="start" /> and <paramref name="length" /> exceeds the number of elements in the array.
+        </exception> 
+        <exception cref="T:System.TypeMismatchException">
+          <paramref name="T" /> is a reference type, and <paramref name="array" /> is not an array of type <paramref name="T" />.</exception> 
       </Docs>
     </Member>
     <Member MemberName="Clear">
@@ -157,8 +189,14 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <remarks>To be added.</remarks>
+        <summary>Clears the contents of this <see cref="T:System.Span`1" /> object.</summary>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+
+The `Clear` method sets the items in the <xref:System.Span%601> object to their default values. It does not remove items from the <xref:System.Span%601>.  
+
+         ]]></format>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="CopyTo">
@@ -184,8 +222,16 @@
       </Parameters>
       <Docs>
         <param name="destination">To be added.</param>
-        <summary>To be added.</summary>
-        <remarks>To be added.</remarks>
+        <summary>Copies the contents of this <see cref="System.Span~1" /> into a destination <see cref="System.Span~1" />.</summary>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+
+If the source and `destination` overlap, this method places the original values in a temporary location before `destination` is overwritten.
+
+         ]]></format>
+        </remarks>
+        <exception cref="T:System.ArgumentException">
+          <paramref name="destination" /> is shorter than the source <see cref="System.Span`1" />.</exception>
       </Docs>
     </Member>
     <Member MemberName="DangerousCreate">
@@ -260,8 +306,8 @@
         <ReturnType>System.Span&lt;T&gt;</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Returns an empty <see cref="T:System.Span`1" /> object.</summary>
+        <value>An empty <see cref="T:System.Span`1" /> object.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -295,10 +341,15 @@
         <Parameter Name="obj" Type="System.Object" />
       </Parameters>
       <Docs>
-        <param name="obj">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <param name="obj">Not supported.</param>
+        <summary>Calls to this method are not supported.</summary>
+        <returns>Calls to this method are not supported.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+Calls to the <xref:System.Span%601.Equals%2A> method are not supported. The method call either generates a compiler error at compile time or throws a <xref:System.NotSupportedException> at run time. To compare two <xref:System.Span%601> objects for equality, use the <xref:System.Span%601.op_Equality%2A> comparison operator.
+
+        ]]></format>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="Fill">
@@ -323,8 +374,8 @@
         <Parameter Name="value" Type="T" />
       </Parameters>
       <Docs>
-        <param name="value">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="value">The value to assign to each element of the span.</param>
+        <summary>Fills the elements of this span with a specified value.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -344,9 +395,14 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Returns an enumerator for this <see cref="T:System.Span`1" />.</summary>
+        <returns>An enumerator for this span.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+Instead of calling the <xref:System.Span%601.GetEnumerator%2A> method directly, you can use the C# `foreach` statement` and the Visual Basic `For Each`...`Next` construct to enumerate a <xref:System.Span%601>.
+
+       ]]></format>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="GetHashCode">
@@ -377,9 +433,11 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <summary>Throws a <see cref="T:System.NotSupportedException" />.</summary>
+        <returns>Calls to this method always throw a <see cref="T:System.NotSupportedException" />.</returns>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.NotSupportedException">
+          Calls to this method are not supported.</exception> 
       </Docs>
     </Member>
     <Member MemberName="GetPinnableReference">
@@ -403,9 +461,14 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Returns a reference to the element of the <see cref="T:System.Span`1" /> at index zero.</summary>
+        <returns>A reference to the element of the <see cref="T:System.Span`1" /> at index zero, or <see langword="null" /> if <see cref="M:System.Span`1.IsEmpty" /> is  <see langword="true" />. </returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+The `GetPinnableReference` method can be used for pinning a <xref:System.Span%601> in memory. It is required to support the use of a <xref:System.Span%601> within a [fixed](~/docs/csharp/language-reference/keywords/fixed-statement.md) statement.
+
+       ]]></format>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="IsEmpty">
@@ -427,8 +490,8 @@
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Returns a value that indicates whether the current <see cref="T:System.Span`1" /> is empty.</summary>
+        <value><see langword="true" /> if the current span is empty; otherwise, <see langword="false" />.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -455,9 +518,11 @@
       </Parameters>
       <Docs>
         <param name="index">To be added.</param>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets or sets the element at the specified zero-based index.</summary>
+        <value>The element at the specified index.</value>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.IndexOutOfRangeException">
+          <paramref name="index" /> is less then zero or greater than or equal to <see cref="P:System.Span`1.Length" />.</exception> 
       </Docs>
     </Member>
     <Member MemberName="Length">
@@ -479,8 +544,8 @@
         <ReturnType>System.Int32</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Returns the length of the current span.</summary>
+        <value>The length of the current span.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -507,11 +572,17 @@
         <Parameter Name="right" Type="System.Span&lt;T&gt;" />
       </Parameters>
       <Docs>
-        <param name="left">To be added.</param>
-        <param name="right">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <param name="left">The first span to compare.</param>
+        <param name="right">The second span to compare.</param>
+        <summary>Returns a value that indicates whether two <see cref="T:System.Span`1" /> objects are equal.</summary>
+        <returns><see langword="true" /> if the two <see cref="T:System.Span`1" /> objects are equal; otherwise, <see langword="false" />.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+
+Two <xref:System.Span%601> objects are equal if they have the same length and the corresponding elements of `left` and `right` point to the same memory. Note that the test for equality does *not* attempt to determine whether the contents are equal.
+
+         ]]></format>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="op_Implicit">
@@ -536,9 +607,9 @@
         <Parameter Name="span" Type="System.Span&lt;T&gt;" />
       </Parameters>
       <Docs>
-        <param name="span">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="span">The object to convert to a <see cref="T:System.ReadOnlySpan`1" />.</param>
+        <summary>Defines an implicit conversion of a <see cref="T:System.Span`1" /> to a <see cref="T:System.ReadOnlySpan`1" />.</summary>
+        <returns>A read-only span that corresponds to the current instance.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -564,9 +635,9 @@
         <Parameter Name="array" Type="T[]" />
       </Parameters>
       <Docs>
-        <param name="array">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="array">The array to convert to a <see cref="T:System.Span`1" />.</param>
+        <summary>Defines an implicit conversion of an array to a <see cref="T:System.Span`1" />.</summary>
+        <returns>The span that corresponds to <paramref name="array" />.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -597,10 +668,10 @@
         <Parameter Name="segment" Type="System.ArraySegment&lt;T&gt;" Index="0" FrameworkAlternate="netcore-2.1" />
       </Parameters>
       <Docs>
-        <param name="arraySegment">To be added.</param>
-        <param name="segment">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="arraySegment">The array segment to be converted to a <see cref="T:System.Span`1" />.</param>
+        <param name="segment">The array segment to be converted to a <see cref="T:System.Span`1" />.</param>
+        <summary>Defines an implicit conversion of an <see cref="T:System.ArraySegment" /> to a <see cref="T:System.Span`1" />.</summary>
+        <returns>A span that corresponds to the array segment.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -627,11 +698,17 @@
         <Parameter Name="right" Type="System.Span&lt;T&gt;" />
       </Parameters>
       <Docs>
-        <param name="left">To be added.</param>
-        <param name="right">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <param name="left">The first span to compare.</param>
+        <param name="right">The second span to compare.</param>
+        <summary>Returns a value that indicates whether two <see cref="T:System.Span`1" /> objects are not equal.</summary>
+        <returns><see langword="true" /> if the two <see cref="T:System.Span`1" /> objects are not equal; otherwise, <see langword="false" />.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+
+Two <xref:System.Span%601> objects are equal if they have different lengths or if the corresponding elements of `left` and `right` do not point to the same memory. 
+
+         ]]></format>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="Slice">
@@ -656,10 +733,12 @@
         <Parameter Name="start" Type="System.Int32" />
       </Parameters>
       <Docs>
-        <param name="start">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="start">The index at which to begin the slice.</param>
+        <summary>Forms a slice out of the current span that begins at a specified index.</summary>
+        <returns>A span that consists of all elements of the current span from <paramref name="index" /> to the end of the span.</returns>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentOutOfRangeException">
+          <paramref name="index" /> is less than zero or greater than or equal to <see cref="T:System.Span`1.Length" />.</exception> 
       </Docs>
     </Member>
     <Member MemberName="Slice">
@@ -685,11 +764,13 @@
         <Parameter Name="length" Type="System.Int32" />
       </Parameters>
       <Docs>
-        <param name="start">To be added.</param>
-        <param name="length">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="start">The index at which to begin this slice.</param>
+        <param name="length">The desired length for the slice.</param>
+        <summary>Forms a slice out of the current span starting at a specified index for a specified length.</summary>
+        <returns>>A span that consists of <paramref name="length" /> elements from the current span starting at <paramref name="index" />.</returns>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentOutOfRangeException">
+          <paramref name="start" /> or <paramref name="start" /> + <paramref name="index" /> is less than zero or greater than <see cref="T:System.Span`1.Length" />.</exception> 
       </Docs>
     </Member>
     <Member MemberName="ToArray">
@@ -712,9 +793,15 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Copies the contents of this span into a new array.</summary>
+        <returns>An array containing the data in the current span.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+
+This method performs a heap allocation and therefore should be avoided if possible. It it sometimes necessary when APIs that support <xref:System.Span%601> objects are not available but APIs that work with arrays are.
+
+         ]]></format>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="ToString">
@@ -733,9 +820,14 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Returns the string representation of this <see cref="T:System.Span`1" /> object.</summary>
+        <returns>The string representation of this <see cref="T:System.Span`1" /> object.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+For a `Span<Char>`, the `ToString` method returns a <xref:System.String> that contains the characters pointed to by the <xref:System.Span%601>. Otherwise, it returns a <xref:System.String> with the name of the type and the number of elements that the <xref:System.Span%601> contains.
+
+       ]]></format>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="TryCopyTo">
@@ -760,10 +852,18 @@
         <Parameter Name="destination" Type="System.Span&lt;T&gt;" />
       </Parameters>
       <Docs>
-        <param name="destination">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <param name="destination">The target of the copy operation.</param>
+        <summary>Attempts to copy the current <see cref="T:System.Span`1" /> to a destination <see cref="T:System.Span`1" /> and returns a value that indicates whether the copy operation succeeded.</summary>
+        <returns><see langword="true" /> if the copy operation succeeded; otherwise, <see langword="false" />.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+
+If the source and `destination` overlap, this method places the original values in a temporary location before `destination` is overwritten.
+
+If `destination` is shorter than the source <xref:System.Span%601>, this method returns `false`, and no data is written to `destination`.
+
+         ]]></format>
+        </remarks>
       </Docs>
     </Member>
   </Members>